Improvement in lamps



H. M. CLARKE.

Lamp.

No. 101,584. Patented April 5,1870.

NJPETERS, PHOTOLITHDGRAFHER. WASHINGTONy D CA inittrlf ndert gaat eine.,

HEZEKIAH M. CLARK, OF MERIDEN, CONNECTICUT, ASSIGNOR T O HIMSELF, ELISHA J. BARNARD, AND CHARLES BLANCHARD, OF SAME PLACE.

Lette-rs Patent No. 101,584, dated April 5, 1870.

IMPROVEMENT IN LAMPS.

The Schedule referred to in these Letters Patent and making part of the same l:drawing constitutes part of this specication, and represents a vertical central section. This invention relates to an improvement in the lamp patented to the inventor in this application, dated March 24, 1868, the object being the adaptation of a glass central tube instead of the metal tube heretofore used, such adaptation requiring a different construction of the parts; and

It consists in the arrangement oia glass tube with 'in the bowl oi' the lamp, with notches cut at the bottom to permit the supply of oil, and the upper end cap is also attached to t-he lamp.

A is the bowl of a common glass lamp.

B, the tube, which is also formed from glass, so as to sit down onto the bottom of the bowl, and provided with several openings a a to communicate with the bowl outside of the tube.

The upper end of the tube is made Haring, to sit into the neck of the lamp, around which calcine plaster 0r other suitable cement is placed; then the cap is set thereon, the cement securing the cap, lamp, and tube all together.

To veut the lamp, I cut one or more notches, d, at the upper edge of t-he tube, and, during the process otcementing, inserta wire, f, through the said notches; then, as soon as the cement is set,withdraw the wire and the vent is eiected.

I claim as my invention- The arrangement of the glass tube B within the bowl A of the lamp, the said tube being,r provided with notches a at the bottom, and secured with the cap c and neck of the lamp by the application of cement, as specified, and the lamp vented substantially in the manner described. secured by plaster or cement, by means of which the Huf/,miran M. CLARK.

\\'ituesses z L. Brnnsur, THEODORE BYXBEE. 

